[Numpy-discussion] Use __slots__ with numarray?

Todd Miller jmiller at stsci.edu
Fri Nov 12 06:16:13 CST 2004


On Fri, 2004-11-12 at 04:27, Jens Jorgen Mortensen wrote:
> A few days ago, I found this page:
> 
> http://mail.python.org/pipermail/python-list/2004-May/220513.html
> 
> where speedups for creating objects using __slots__ is demonstrated.  I 
> have read somewhere that creation of numarrays is much slower than 
> creation of Numeric arrays - so maybe using __slots__ should be considered?
> 
> Just a suggestion from a happy numarray user!

Thanks for the suggestion!   I wondered about this before,  but the idea
fizzled through a combination of doubt about how much performance gain
would be involved and the impression that using __slots__ would preclude
creation of new attributes on basic NumArrays.  

Seeing real information about the performance motivates me to take a
closer look, so thanks.  I think placing the "no new attributes without
subclassing" restriction on NumArrays is probably worth the gains and
will check into it.

This day is getting better and better,
Todd







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